Caffeine Half-Life Suite: 4 Steps

Estimate remaining caffeine in the body after a given time using a 5-hour average half-life.

Calculate a medication dose from a mg-per-kg rate and body weight. For reference only — always confirm dosing with a clinician.

Calculate IV infusion drip rate from total volume, infusion time, and drop factor.

Estimate glomerular filtration rate using a simplified CKD-EPI style formula from serum creatinine, age, and sex.